Browser selection problem

HTML5 Selection

/*
Comments
========

*---* [Jane Smith] Hey [Rob], what do you think about
|   | switching the roll-out plan over to a faster schedule?
*---*
      {{{ I guess my concern is that we won't learn fast
      enough, and that will put the project... [See More]

      [Like] * [Reply] * 12 — October 17 at 2:01 PM — [Edited]

*---* [Bill Page] I'm with [Jane] on this one. I'm thinking
|   | back to the Lightspeed rewrite when we were able to
*---* course correct early on }}} and it really helped.

      Let's loop in some folks from the Fizz... [See More]

      [Like] * [Reply] — October 17 at 2:12 PM

(Text selection begins at "{{{" and ends at "}}}".)
*/


function textInRange(a, b) {

  return ...
}

ο χρηστης επιλεγει με το ποντικι κειμενο που περιεχει κατι απο το πρωτο comment και λίγο από το δευτερο (html nodes), γράψε μια function που θα επιστρεφει μονο το κειμενο (χωρίς like, reply, dates κλπ)